Immune Response Calculator

Expected antibody response timeline from vaccination.

Medical Disclaimer

This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.

Inputs

Days post-vaccination

Patient age (years)

Immunocompromised

Dose number (1-5)

Tab to move between fields

Results

IgG level (relative units)

66.7

IgM level (relative units)81.9

Seroconversion probability (%)85%

Protection level (%)33%

Days to peak immunity21

How to Use This Calculator

Enter Days post-vaccination, Patient age (years), and Immunocompromised.
Set Immunocompetent, Immunocompromised, and Dose number (1-5).
Review the IgG level (relative units) result.
Use IgM level (relative units) and Seroconversion probability (%) (%) to inform your decision.

How the result changes with Days post-vaccination

Days post-vaccination	IgG level (relative units)
37	85.2
128	34.3
237	11.5
329	4.6

What each input means

Days post-vaccination: Number of days since vaccination.
Patient age (years): Patient age - immune response declines after age 65.
Immunocompromised: Select immune status.
Dose number (1-5): Which dose in the series (2+ triggers anamnestic response).

What each result means

IgG level (relative units): Estimated IgG antibody level at the specified time point.
IgM level (relative units): Estimated IgM antibody level (peaks early, declines fast).
Seroconversion probability (%): Likelihood of developing protective antibody levels.
Protection level (%): Estimated level of clinical protection.
Days to peak immunity: Expected days until maximum antibody response.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Days post-vaccination = 14, Patient age (years) = 40, Immunocompromised = 0, Dose number (1-5) = 1 = 4 input(s) provided
Calculate IgG level
66.7 = 66.7
Calculate IgM level
81.9 = 81.9
Calculate Seroconversion probability
Seroconversion probability
85 = 85%